Selective Laser Sintering — prototypes and production runs in PA12 and TPU
SLS technology makes it possible to produce strong, durable and complex components without supports, with maximum precision. Ideal for functional prototypes and small-batch production, it delivers consistent quality and repeatability.
Every part starts from a 3D model. During preparation, we optimise orientation, density and structure to achieve perfect results in the SLS process.
Process
Selective laser sintering (SLS) brings every component to life, ensuring strength and precision in every detail.
From powder to product, a solid and reliable process.
Isotropic and anisotropic
An SLS part is nearly isotropic: sintered powder gives similar properties along X, Y and Z. It can take loads in any direction.
XY along the layers · Z between the layers
FDM · filament
The part is built layer by layer. Along the layers (XY) it is strong; across the layers (Z), interlayer adhesion is the weak point.
PA6-CF: tensile strength 109 MPa along the layers, 54 MPa between the layers (Polymaker datasheet).
We orient the part in the machine so that the load runs along the layers.
XY along the layers · Z between the layers
SLS · powder
The powder is fused throughout the volume, with no deposited filament: properties are very similar in every direction.
PA12: same tensile strength (50 MPa); slightly lower elongation at break in Z (6% vs 11%), Formlabs datasheet.
The part can be oriented as needed for accuracy and to fit more parts in one build.
XY along the layers · Z between the layers
MSLA · resin
The resin layers bond chemically to one another during curing: the part behaves like a single block.
Resins behave the same in all directions after full curing.
Ideal for fine detail; less impact-resistant than nylon and composites.
0.3 mm
Dimensional accuracy
PA12 Powder
Mechanical strength
Bead-blasted finish
Uniform, matt texture
TPU 90A
Elasticity and flexibility
Every component is designed and made to deliver maximum precision, strength and an impeccable surface finish. SLS printing makes it possible to achieve complex geometries without supports and consistent performance on every part produced.
Choose your sector: we’ll show you the applications and the right material.
165 × 165 × 300 mm
± 0.3% (± 0.3 mm)
110 μm for sharp details and uniform surfaces
Production runs made to order and pre-production batches
Optimise the design of your components for selective laser sintering. Click each section to view the recommended parameters, technical images and design notes based on the Formlabs Fuse guidelines.
≥ 0.8 mm
≥ 1.0 mm
Vertical walls 0.6 mm / horizontal 0.3 mm
≥ 0.7 mm recommended
≥ 3.5 mm
A. Horizontal surfaces • B. Vertical surfaces
A. Horizontal surfaces • B. Vertical surfaces
± 0.3 mm (standard)
0.2 – 0.6 mm
Note: the following guidelines are indicative only and may vary depending on the material, the part geometry and the print parameters used. For specific projects or advanced technical requirements, we recommend contacting the Doppialinea technical department for personalised advice.
SLS quote
PA12 and TPU powder — prototypes and custom production runs. Upload your file or email us for a technical review.
SLS technology guide
SLS (Selective Laser Sintering) sinters thermoplastic powders with a laser: parts are built without supports, with good mechanical strength and geometric freedom. It is the go-to technology when a component has to be tested, assembled and reproduced in short runs.
At Doppialinea we produce in-house on Fuse machines with PA12 (standard and premium finish) and TPU 90A Shore, with bead blasting included and optional finishes on request.
At a glance
It suits functional prototypes, lightweight tooling, housings, brackets and pilot batches of up to several hundred parts.
Workflow
Upload your file
STEP or STL in the online quote tool, with quantity and material.
Technical review
We check wall thicknesses, overall dimensions and build orientation.
SLS production
Printing, depowdering and industrial bead blasting in-house.
Delivery
Parts ready for testing, assembly or pre-production.
Frequently asked questions
Calculate your SLS quote
Indicative price in a few minutes — PA12, TPU, quantities and lead times.